Before adding memory, which of the following actions should be performed? Choose all correct options.

A.
Check the user manual of the server board to verify that the server board supports the memory configuration and size that you want to install.

B.
If necessary, compare the signal-to-clock Column Address Strobe (CAS) rates to verify compatibility between your current memory and the memory you want to add.

C.
Always perform a BIOS upgrade because when you add memory, it is the best time to upgrade the BIOS.

D.
All of the above.

Explanation:
Before adding additional memory, you must verify that the server board supports the memory configuration and size that you want to install. You can compare the signal-to-clock Column Address Strobe (CAS) rates to verify compatibility between your current memory and the memory you want to add.
Incorrect Answers:
C: It is rarely necessary to upgrade the BIOS when you add memory. The recommended time to upgrade the BIOS is when adding newer, faster processors.
References:
Charles J. Brooks, Server+ Certification Exam Cram 2 (Exam SK0-002), QUE Publishing, Indianapolis, 2006, pp. 380-381, 390.